Brushless motor motor automatic locking screw machine need what spare parts and how to set up the security stock?
Brushless motor motor automatic locking screw machine in the process of operation, some parts may be worn, damaged, prepare the appropriate spare parts and set up a reasonable protection stock, can protect the normal operation of the equipment, reduce downtime. The following is an introduction to the required spare parts and the method of setting up the protection stock:
I. Required spare parts
1、Mechanical
Batch nozzle: The batch nozzle is a part that directly contacts with the screws, which is easy to wear out in the frequent locking and paying process. Screws of different specifications require different types of batch nozzles, and a variety of commonly used specifications of the batch nozzles should be prepared.
Transmission belt and chain: used to transmit power, long time use will be stretched, wear and tear or even broken, need to prepare different types and lengths of transmission belt and chain.
Screws and guide rails: screws and guide rails are responsible for ensuring the accuracy of the locking position, if there is wear and tear or damage will affect the accuracy of the screw locking, you need to prepare the corresponding specifications of the screws and guide rails.
Screw vibration plate accessories: such as vibration plate springs, electromagnets, etc., these parts may be damaged due to long-term vibration, to prepare the appropriate accessories.
Feeding tube: feeding tube in the process of conveying screws may be blocked, broken and other issues, should be prepared for different internal diameter and length of the feeding tube.
2、Electrical
Motor: Brushless motor is the power source of the equipment, although the reliability is high, but there may be failures, need to prepare the appropriate motor.
Driver: the driver is used to control the operation of the motor, if there is a failure will lead to the motor can not work properly, should be prepared for the appropriate type of driver.
Sensors: including screw detection sensors, position sensors, etc., sensor failure will affect the detection and positioning of the equipment on the screw, to prepare commonly used sensors.
Relays and contactors: used to control the circuit on and off, frequent action may lead to contact wear, need to prepare a certain number of relays and contactors.
Power module: to provide stable power for the equipment, if the power module is damaged will lead to equipment can not start normally, should be prepared to adapt the power module.
3、Other categories
Fuse: In the event of overload or short circuit, the fuse will blow to protect the equipment, need to prepare different specifications of the fuse.
Control board: The control board is the control core of the equipment, if it fails, it may lead to abnormal operation of the equipment, so the spare control board should be prepared.
Second, to protect the inventory setup method
1、Historical data analysis method
Collect the past period of time (e.g., one year) the replacement records of each spare part of the equipment, including the time of replacement, the reason for replacement, the number of replacement and other information.
Analyze the data and calculate the average replacement cycle of each spare part and the average number of each replacement. For example, a certain type of batch nozzle in the past year, on average, every 2 months, each replacement of 3, then the batch of nozzles can be set to protect the inventory of 6 or so.
2, failure mode and impact analysis method (FMEA)
FMEA analysis of the equipment to assess the degree of impact of each component failure on the overall operation of the equipment and the probability of occurrence.
For the high degree of impact, the probability of occurrence of a greater number of components, the appropriate increase in its guaranteed inventory. Such as motor failure will lead to equipment can not run, and according to the experience of its failure probability is relatively high, should increase the guaranteed inventory of motor.
3, the supplier delivery method
Understand the spare parts supplier's delivery period, for the longer delivery period of spare parts, need to set a higher guarantee stock, in order to prevent the lack of stock and affect the normal use of equipment.
For example, a special specification of the screw supplier delivery period of 3 weeks, then at least 3 weeks should be prepared to meet the amount of guaranteed inventory.
4, cost-benefit analysis
Consider the procurement cost of spare parts, storage costs and stock-out costs. Procurement costs are low, storage costs are not high, but out of stock will cause large losses of spare parts, should be appropriate to increase the guaranteed inventory.
Such as control board procurement cost is relatively not high, but the lack of stock will lead to equipment downtime for a long time, resulting in greater production losses, then a certain number of control boards should be guaranteed to protect the inventory.
5, regular assessment and adjustment
Safeguard inventory is not fixed, should be regularly assessed and adjusted to protect the inventory.
With the increase in the use of equipment, equipment performance changes, supplier delivery date changes and other factors, the use of spare parts may change, the need to adjust the level of guaranteed inventory in a timely manner in accordance with the actual situation, to ensure that not only to meet the needs of equipment maintenance, but also will not cause excessive inventory backlog.
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